KA34063AD Buck-Boost Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The KA34063AD is a buck-boost switching regulator IC manufactured by onsemi, designed for positive or negative adjustable output applications with 1.5A switch current capability. This component operates across a 3V to 40V input range and supports both step-up and step-down topologies in a compact 8-SOIC surface mount package.

The KA34063AD is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator topology.

Substiute Parts

KA34063AD

onsemiIn Stock: 5829KA34063AD Datasheet

Current PartRFQ

MC34063ACD-TR

STMicroelectronicsIn Stock: 80165MC34063ACD-TR Datasheet

DirectRFQ

MC34063ECD-TR

STMicroelectronicsIn Stock: 10307MC34063ECD-TR Datasheet

DirectRFQ

MC34063ABD-TR

STMicroelectronicsIn Stock: 55320MC34063ABD-TR Datasheet

UpgradeRFQ

MC34063EBD-TR

STMicroelectronicsIn Stock: 43254MC34063EBD-TR Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KA34063AD is determined by strict alignment of the following electrical and mechanical parameters:

Core Compatibility Criteria:

• Topology: Buck, Boost (step-up and step-down capability)
• Output Configuration: Positive or Negative (adjustable)
• Number of Outputs: 1
• Current - Output: 1.5A (Switch)
• Voltage - Input Range: 3V to 40V minimum and maximum
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Substitute Parts Identified:

All four substitute parts (MC34063ACD-TR, MC34063ECD-TR, MC34063ABD-TR, MC34063EBD-TR) are manufactured by STMicroelectronics and meet the core electrical and mechanical compatibility requirements. These parts share the same base product number (MC34063) and maintain identical input voltage range, output current rating, package configuration, and functional topology as the KA34063AD.

Differences among substitute parts are limited to operating temperature range and product status, which do not affect electrical substitutability for applications within the specified temperature envelope.

Parameter Comparison

Engineering Selection Recommendations

All four STMicroelectronics MC34063 variants are active products with ROHS3 compliance and REACH unaffected status, providing regulatory continuity for new designs and ongoing production.

MC34063ACD-TR and MC34063ECD-TR maintain the original 0°C to 70°C operating temperature range of the KA34063AD, making them direct functional replacements for applications within this thermal envelope.

MC34063ABD-TR extends the operating temperature range to -40°C to 85°C, suitable for applications requiring enhanced low-temperature performance or wider industrial temperature specifications.

MC34063EBD-TR provides the widest operating temperature range of -40°C to 125°C, appropriate for high-temperature or extended-range industrial and automotive applications.

Selection among these variants depends on the target application's operating temperature requirements and supply chain availability. All variants maintain identical electrical performance within their respective temperature ratings and are pin-compatible with the KA34063AD in the 8-SOIC package.

Frequently Asked Questions (FAQ)

Q: Are all MC34063 variants electrically interchangeable with the KA34063AD?

A: Yes, within their specified operating temperature ranges. All four MC34063 variants share identical input voltage range (3V to 40V), output current rating (1.5A), topology (buck-boost), and 8-SOIC package configuration. The primary differences are operating temperature range and product status (all active versus obsolete).

Q: What is the significance of the switching frequency difference (100Hz ~ 100kHz for KA34063AD versus 33kHz for MC34063 variants)?

A: The KA34063AD specifies a wider switching frequency range, while the MC34063 variants operate at a fixed 33kHz. This difference does not affect substitutability; the fixed 33kHz frequency of the MC34063 variants falls within the KA34063AD's specified range and is suitable for the same application topologies.

Q: Which MC34063 variant should I select for a new design?

A: For new designs, select based on your application's operating temperature requirements. MC34063ACD-TR or MC34063ECD-TR for 0°C to 70°C applications, MC34063ABD-TR for -40°C to 85°C, or MC34063EBD-TR for -40°C to 125°C. All are active products with current availability and regulatory compliance.

Q: Are there packaging differences among the MC34063 variants?

A: All four variants use the same 8-SOIC (0.154", 3.90mm Width) surface mount package. Packaging options differ (Cut Tape with Digi-Reel for some, Cut Tape only for others), but the component package itself is identical, ensuring PCB layout compatibility.

Q: What compliance certifications apply to the MC34063 substitutes?

A: All MC34063 variants are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components in most markets.